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The 3D Printed Aortic Model Helps Doctors Determine The Best Course Of Treatment For A Patient.
Mar 09, 2018

Ohio state university, doctor and biomedical engineers have used CT scan data on the flexible material 3D printing aorta patients, these 3D print in the aorta model can be in the heart of the simulator test to determine the best treatment process.


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Test the 3D printed aorta in the heart simulator



Patients may need aortic valve replacement for many reasons.However, one of the most common causes is the narrowing of the aortic valve and narrowing of the valve opening.This stenosis occurs when the valve "lobules" becomes rigid due to calcification, which prevents the left ventricle from pumping enough blood to the main artery.

Once the valvular disease in this way, doctors need to determine the appropriate action, this is usually one of the following two conditions: either completely with the risk of cardiac operation (need to open the chest) replace diseased valve, or use the more secure the catheter method to through the leg blood vessels in the deployment of biological valve prosthesis organization.

But which method?For doctors at Ohio state university's waxner medical center, 3D printing is helping them make the tough decision in a smarter way.


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3D printed aorta in a heart simulator with artificial blood


It involves in the 3D printing copy aortic CT scanner used before get patients with aortic 3 d images, then use a flexible 3 d printing wire. Then can be these 3D print of the aortic valve is installed to the physical heart simulator, to understand how patients may react to new or transcatheter program the aortic valve.

"For most patients, the available valve can have the effect of fairly," interventional cardiologist and Ohio state Ross cardiac structural heart disease hospital project co-director of Dr. Scott Lilly said. "But, in some cases, the patient's anatomical structure may lead to additional consideration. For example, patients may have calcified nodules on disc blade, or near the valve in coronary artery. Rebuilding the valve area ability is very important."

Lilly and an Ohio Davis heart and lung institute of biomedical engineering and associate professor of surgery Lakshmi Prasad Dasi leadership of the team cooperation, to obtain the 3D print model, then the model is loaded into the heart in the simulator with fake blood, "amazingly, it completely transparent!


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Dr. Scott Lilly performed the transcatheter aortic valve replacement


By installing a heart simulator, the medical team can use lasers and high-speed cameras to measure the flow velocity and eddy current patterns with or without replacement valves.

"We can simulate various treatments, locations and types of valves to better understand problems such as leakage, clotting, or coronary artery occlusion," Dasi said."We can see that different valves not only relieve the stenosis, but also reduce the possibility of thrombosis on the leaflets, which is the goal of treatment."

Computer models are also used to analyze blood flow and the interaction between the catheter valve and the patient's anatomy.

"Using 3D modeling, we can determine whether the blood vessels are protected during deployment, or even if the valve replacement can continue," Lilly explained."These discussions directly tell us how to deal with many valve replacement operations."

Dasi's team now plans to improve its biological valve, which is currently limited in durability.Future synthetic versions can be enhanced by biomolecules to make future catheter heart valves cheaper and more durable.